Joint



Nov. 10, 1931.

' H.JUNKERS JOINT Filed 001:. 5, 1925 2 Sheets-Sheet 1 Nov. 10, 1931.

' Fig.2

H. JUNKERS JOINT Filed Oct. 5 1925 2 Sheets-Sheet 2 Patented Nov. 1o,1931 UNITED STATES HUGO JUNKEBS, or DESSAU; GERMANY JOINT ApplicationflIed October 5, 1925, Serial No. 60,697, and in Germany November 6,1924.

My invention relates to joints and more particularly to a joint of theoscillating rollmg type,

t is an object of my invention to improve the cooperating faces of thejoint against any movement except relative rolling. To this end Iprovide a head on one of the bodies of the joint which is wider than theadjoining lo portion of its body and on this head I form a curvedcontact face. On the other body I form a mating contact face which is inrolling contact with, and of different contour from,

the contact face on the head, and at each side of the face of differentcontour I provide converging members embracing the head so as to holdthe faces in permanent contact.

All arrangements of this kind hitherto known involve the disadvantagethat, whenever all other movements except simple rolling motion shall berendered impossible, the device becomes comparatively complicated,separate members being required for instance for preventing relativesliding motion of the rolling bodies, relative angular motion, andlifting of one body relative to the other, when a pull is exertedthereon. 1

According to the present invention all relative movements of the rollingsurfaces with the only exception of rolling motion are e fl'ectuallyprevented and a simple and particularly reliable device is obtained, byproviding 7 a tooth and gap connection between the two rolling bodies,the flanks of a gap, which 0011 verge towards the outside, overlappingthe flanks of the tooth projecting into the gap.

In the drawings affixed to this specification and'forming part thereofjoints embodying my invention are illustrated diagrammatically by way ofexample.

In the drawings:

Fig. 1 is a diagram of a joint in accordance with the present invention,one of the oooperating parts being shown in cross-section.

a joint of this type with a view to holding oscillates ,The body 2 hasformed at both ends of the f other without the rolling Fig. 2 is asimilar view of a modifiedjconstruction'. e i In the drawings 1 and 2are the twogoscillating bodies, the body 1 being here assumed to remainrelatively stationary, while body 2 as indicated by the arrows at. o

rolling surface 34 faces of teeth 31, 32 respectively, these facesconvergingtowards the outsideso as to overlap the faces 35, 36 ar rangedat the ends of rolling surface 33, of body 1. It will appearthat in thismanner a headisformed on the body 1 which is wider than the adjoiningportion of the body. The contact face 33 of'the head is curved and themating contact face 34 onthe body 2. is of different contour and in thepresent instance is shown. plane. The normal rules governing toothedgearings allow the cooperating parts to be designed so as to involve arelative rolling motion of the bodies 1, 2 all over the path ofoscillation and practically without play, the peculiar form of thecooperating parts at the same time allowing the transmission oftensionalforcesfrom one body to the surfaces being enabled to be liftedoff one another in any relative position of the parts.

Fig. 2 illustrates a joint constructed substantially in accordance withFig. 1 and its principal parts are therefore marked with the sameletters of reference. In this instance, however, the rolling surface 34.of the body. 2 is formed on a separate body 51 which is pivoted to therolling body 2 by means of pins' so 52, 53 in such manner that it isenabled to execute small turning .movements at right angles to the planeof oscillation of the body 2. By this means here also a uniformdistribution of pressure across the entire width-"8o of the rollingsurfaces 33 and 34 and a uniform distribution of tension over the entirewidth of the toothed gearing is obtained.

The body 5lhas the form of a cylinder, in order to enable it to beeasily introduced into the undivided arms 54, of the body 2. By means ofsleeves 56, 57, introduced into the boring-s of these arms from Withoutand fixed therein by suitable means such as pins, the body 51 ismaintained in correct position.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described for obviousmodifications will occur to a person skilled in the art.

I claim 1. Aioint comprising two bodies, ahead formed on one of saidbodies "and of greater width than the adjoining portion of said body, acurved contact face "formed-ion-said head, another contact face, ofdifferent con-' tour and in rolling contact with the contact face onsaid head. and converglng members,

one on each si-de'of said face o f diflerentcontour, embracing said headsoas to hold .said 'fa'cesin permanent contact. I

2. A joint comprising twovbodies, .a dove- ;tai'led head iformed on oneof said bodies, a :curvefcl-contact 'face'formed ontthe outer end ofsaidhead, a dovetailed :notch formed in the other 'body, a mating contact:Eace atithe bottom of saidnotch which'is of differerrtcontour, and inrolling contact with tliecontact "face on 'sai'd' hea'd, 'the'fianks ofthe dovetailed notch beingapproximately flat andconverging to apointoutside oftheccntact surface. the flanks of the dovetailed'head beingcurved in such amanner as to "b'efin contact with the flanks of thenotch in all positions, which th'e'two bodies may assume "in swinging,relative to one another.

In testimony whereof 'Iaifix-niy signature.

HUGO IIUNKE'RS.

